Same cannabis strain name, same genetics?

What does a shared name establish?

Two seed lots with the same strain name may be related, but the name alone cannot establish their genetic relationship. A trade name records how the material was described. A lot identifier refers to a particular group of seeds. A pedigree describes the reported or documented parental lines. Keep those facts separate so a reader can see whether two records share a label, a documented source or evidence of genetic similarity.

What are you trying to match?

A clone traces back to an individual plant through asexual propagation. Plants from a seed-derived line can differ genetically even when they share ancestry. Separate lots may therefore belong to the same documented line without being the same lot. Similar appearance also cannot establish that two plants came from the same line or are copies of the same plant.

Two lots with one name

Consider two fictional seed lots, A and B. If the only shared information is their name, the relationship remains unresolved. If traceable records assign both lots to the same breeder line, they support a shared origin at that level. They do not show that the lots came from the same production batch or that every plant is genetically identical. If a lab compares one traceable plant from A with one from B, its result applies to those samples. If the documentation and measurement disagree, record the discrepancy until it can be explained.

What does a DNA comparison show?

Schwabe and McGlaughlin compared dried flower samples obtained from US dispensaries and documented donations using microsatellite markers. They found genetic differences among some samples with the same name. Sawler and colleagues analysed leaf samples from hemp and drug-type cannabis using a broader panel of SNPs. In that dataset, strain names were also an unreliable substitute for genetic comparison. These studies describe the material they examined. They do not estimate the rate of mislabelling in Swiss seed lots or establish who has the correct claim to a trade name.

Markers are selected positions in the genome. A match concerns the positions that could be assessed reliably in the samples tested. Its evidential weight depends on factors such as the choice of markers, sample quality and the reference material. A comparison can support or challenge a proposed match, but it does not by itself reconstruct a complete pedigree or establish uniformity across all seeds in a lot.

How should the records be described?

Record the original label, source and lot identifier separately. Attribute pedigree claims to their source and specify exactly which plants or samples were compared. For a lab comparison, preserve the method, reference and scope. If two samples agree at the tested markers, say that. If only the label matches, keep separate records and leave the relationship unresolved. That makes it possible to add better evidence later without treating a tentative identification as a fact.